Map showing principal debris-flow source areas in the San Francisco Bay Region, California [electronic resource] / U.S. Department of the Interior, U.S. Geological Survey ; by Stephen D. Ellen ... [et al.] ; with digital cartographic assistance from Scott E. Graham ... [et al.].
Imprint
Menlo Park, CA : The Survey ; [Denver, CO : USGS Information Services (Open-File Report Sales)], 1997.